I believe the tophats for the typical Bilstein HD + Pink combo are the US Spec B parts. Anyway, I got my Bilsteins and tophats through King of Parts, and I have to say the Pink/HD combo is fantastic....

As mentioned before, you can get by in a mild snow region with all season tires. My last car was an Audi A4 that I ran with various all seasons, and generally with conservative driving I was able to...